Pilot Timeline Series. This is a mechanical pencil. I bought this because I wanted to try using a slightly better mechanical pencil, but I'm selling it because I haven't had the opportunity to use it. The product number is HTL-55R-B. This product is not often seen in stores currently. If you're looking for a mechanical pencil that's different from others, how about this one? It's new and unused, but it has been stored at home, so please refrain from purchasing if you are very concerned about the condition.